# Viking Synth vs Filterstep

The clearest difference is price: Filterstep at Free against Viking Synth's $3.99. Filterstep also leads on iOS requirement (9.3 vs 12.0). On rating, review sentiment, ratings volume and update cadence there is nothing between them.

Filterstep is free to download; Viking Synth costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.7 for Viking Synth against 4.7 for Filterstep. Both are backed by a comparable volume of ratings — 42 and 42 respectively. Written reviews are what separate them: 70% of Viking Synth's written reviews are positive against 73% of Filterstep's.

Viking Synth ships an update every 4 months, Filterstep every 6 months. Both last shipped on October 1, 2026.

## The numbers

| Metric | Viking Synth | Filterstep |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [4.7 (42 ratings)](https://appshunter.io/ios/app/viking-synth/id1085274012/reviews) | [4.7 (42 ratings)](https://appshunter.io/ios/app/filterstep/id1500042551/reviews) |
| Number of ratings | 42 | 42 |
| Positive reviews | 69.8% of reviews | **73.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 6 months |
| Monetization | Paid | **Free** |
| Size | 11 MB | 12 MB |
| Requires iOS | 12.0 | **9.3** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Blamsoft, Inc.](https://appshunter.io/developer/1051938244) | [AUDIOMODERN](https://appshunter.io/developer/1435691908) |

## What reviewers say

### Viking Synth

[App page](https://appshunter.io/ios/app/viking-synth/id1085274012)

This app emulates a classic monophonic analog synthesizer with advanced DSP technology. It features three variable wave oscillators, dual ladder filters, an LFO, and two modulation busses for versatile sound design.  An intuitive interface and extensive preset library make it ideal for creating thick bass and rich lead sounds.

**Highlights:** Three continuously variable wave oscillators, Dual ladder filters (Lowpass/Highpass), Multi-wave LFO, Two modulation busses, Intuitive user interface with expandable controls, 228 presets including Bass, Lead, and Synthwave, State-of-the-art DSP for authentic sound

**In-app purchases:** none

**What reviewers like**

- 🎶 Great sound quality
- 💡 Versatile sound options
- 💰 Excellent value (free)
- 💻 Lightweight and efficient
- 🎹 Good for learning synthesis

**What reviewers complain about**

- ❓ Preset issues
- 🔌 Not a standalone app
- 🐛 Occasional crashes
- 💾 Settings not saving
- 🤷‍♂️ Difficult to find/use

**Reported bugs**

- Presets not showing up
- Presets disappear
- App not showing in AUv3 menu
- Settings not saving after iOS 14 update
- Crashes when opening presets browser

**Requested features**

- More subtle drive mode
- Categorized preset browser
- Polyphony option
- Dark mode
- More apps from developer


### Filterstep

[App page](https://appshunter.io/ios/app/filterstep/id1500042551)

This app offers a creative motion filter plugin for real-time rhythmic movement. Explore intricate patterns and sonic possibilities with various filter effect settings and randomization. Shape any sound into a unique groove.

**Highlights:** Real-time rhythmic movement, Intricate filter effect settings, Filter randomization, Three filter types, Sequencer movement control, Infinity mode

**In-app purchases:** none


## Frequently asked questions

### Is Viking Synth free?

Viking Synth costs $3.99, with no in-app purchases.

### Is Filterstep free?

Filterstep is free to download, with no in-app purchases.

### Which has better reviews, Viking Synth or Filterstep?

Viking Synth and Filterstep are both rated 4.7 out of 5 on the App Store, from 42 and 42 ratings respectively.

### Do Viking Synth or Filterstep have ads?

Neither Viking Synth nor Filterstep shows ads.

### Which is updated more often, Viking Synth or Filterstep?

Viking Synth ships an update every 4 months, and Filterstep every 6 months. Most recently, Viking Synth was updated on October 1, 2026 and Filterstep on October 1, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*